I dont think that my rs is working anymore

i 21F am dating a 27M we´ve been together for 8 month.

i do love him so much he is my first love and someone that I can see a future with.

i cant even imagine my life without his presence and without him by my side. im so in love.

i know he loves me too. but i cant see it often.

im not even sure about it anymore.

we are long distanc, when we are together he treats me good, he shows me affection and love etc but when we are not I dont feel it.

he is always tired and busy.

okay i know he works and its tiring etc but like sometimes i feel like his absence is too much.

maybe i do have attachment issues and separ issues but at the same time I feel like its a lot.

i wanna leave for my own good and mental healt. but at the same time I cant cause i think that he is the one and idk if its even true or not.

im having ment breakdowns a lot and im so confused.

i just need advice i really need it.